Wyoming Snow Precipitation Update
United States Natural Resources Water and Climate Center
Department of Conservation Portland, Oregon
Agriculture Service
S N O W - P R E C I P I T A T I O N U P D A T E
Based on Mountain Data from NRCS SNOTEL Sites
As of FRIDAY: APRIL 9 , 1999
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
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WYOMING
SNAKE RIVER
BASE CAMP 7030 23.7 16.9 142 27.9 23.5 119
COTTONWOOD CREEK 7600 26.0 23.9 109 28.9 26.4 110
GRANITE CREEK 6770 21.9 18.4 120 23.7 24.9 96
GRASSY LAKE 7265 43.8 37.3 118 41.8 39.3 107
GROS VENTRE SUMMIT 8775 16.2 16.0 101 16.2 16.9 96
LEWIS LAKE DIVIDE 7860 41.8 36.4 115 41.2 39.8 104
PHILLIPS BENCH 8200 34.0 30.4 113 33.0 31.5 105
SALT RIVER SUMMIT 7600 16.5 14.2 117 19.0 17.9 107
SNAKE RIVER STATION 6920 22.4 18.7 120 26.4 27.5 96
SPRING CREEK DIVIDE 9000 31.7 29.0 110 29.2 28.9 101
THUMB DIVIDE 7980 -M 17.4 * -M 22.0 *
TOGWOTEE PASS 9580 -M 26.4 * 29.4 29.9 99
TWO OCEAN PLATEAU 9360 37.3 26.7 140 31.9 32.3 99
WILLOW CREEK 8450 34.7 31.2 111 38.9 33.8 116
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Basin wide percent of average 118 104
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 26.9 24.9 109 24.0 19.0 127
BLACK BEAR 7950 51.3 39.5 130 -M 42.8 *
CANYON 7940 18.7 13.5 139 20.0 15.0 134
FISHER CREEK 9100 41.0 37.3 111 37.8 38.5 98
MADISON PLATEAU 7750 -M 25.4 * 33.3 27.7 121
NORTHEAST ENTRANCE 7350 12.2 9.1 135 14.5 12.5 116
PARKER PEAK 9400 24.2 22.7 107 -M 16.4 *
SYLVAN LAKE 8420 27.0 23.4 116 28.4 20.2 141
THUMB DIVIDE 7980 -M 17.4 * -M 22.0 *
TWO OCEAN PLATEAU 9360 37.3 26.7 140 31.9 32.3 99
WHISKEY CREEK 6800 21.7 18.0 121 25.2 23.0 110
WHITE MILL 8700 28.7 25.7 113 25.5 29.9 86
WOLVERINE 7650 -M 11.9 * 13.0 13.5 97
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Basin wide percent of average 121 110
WIND RIVER
BURROUGHS CREEK 8750 17.4 15.2 115 18.7 17.5 107
COLD SPRINGS 9630 9.5 8.6 111 13.1 11.4 116
DEER PARK 9700 18.2 -M * 23.4 -M *
HOBBS PARK 10100 19.2 16.0 120 17.9 15.1 119
LITTLE WARM 9620 15.6 12.7 123 16.9 14.2 119
SOUTH PASS 9040 19.2 17.2 112 20.4 18.2 113
ST. LAWRENCE ALT 8620 7.8 7.5 106 11.5 11.0 106
TOGWOTEE PASS 9580 -M 26.4 * 29.4 29.9 99
TOWNSEND CREEK 8700 11.4 10.2 111 14.6 13.5 109
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Basin wide percent of average 115 110
BIGHORN BASIN
BALD MTN. 9375 20.7 21.7 96 19.0 18.4 104
BEAR TRAP MEADOW 7900 4.3 7.1 60 10.1 9.0 114
BLACKWATER 9780 31.7 23.9 134 26.2 18.9 139
BONE SPRINGS DIV 9350 18.2 17.5 104 17.2 16.0 107
EVENING STAR 9200 34.5 28.4 122 35.3 23.7 150
GRAVE SPRINGS 8550 8.7 10.2 86 12.0 10.5 115
KIRWIN 9550 13.2 10.7 124 15.0 11.5 131
MARQUETTE 8760 9.2 8.5 109 10.0 10.6 95
MIDDLE POWDER 7760 12.0 13.0 93 16.7 12.7 132
OWL CREEK 8975 7.3 4.8 154 7.5 6.8 109
POWDER RIVER PASS 9480 12.5 11.5 110 15.7 12.5 127
SHELL CREEK 9580 17.2 15.7 110 15.9 14.0 114
SYLVAN LAKE 8420 27.0 23.4 116 28.4 20.2 141
SYLVAN ROAD 8120 -M 11.6 * -M 16.9 *
TIMBER CREEK 7950 5.6 6.5 87 7.6 8.0 97
YOUNTS PEAK 8350 21.9 17.9 123 19.7 17.4 113
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Basin wide percent of average 111 122
SHOSHONE RIVER
BLACKWATER 9780 31.7 23.9 134 26.2 18.9 139
EVENING STAR 9200 34.5 28.4 122 35.3 23.7 150
KIRWIN 9550 13.2 10.7 124 15.0 11.5 131
MARQUETTE 8760 9.2 8.5 109 10.0 10.6 95
SYLVAN LAKE 8420 27.0 23.4 116 28.4 20.2 141
SYLVAN ROAD 8120 -M 11.6 * -M 16.9 *
YOUNTS PEAK 8350 21.9 17.9 123 19.7 17.4 113
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Basin wide percent of average 123 132
POWDER-TONGUE
BEAR TRAP MEADOW 7900 4.3 7.1 60 10.1 9.0 114
BIG GOOSE 7990 7.3 -M * 11.1 -M *
BONE SPRINGS DIV 9350 18.2 17.5 104 17.2 16.0 107
BURGESS JUNCTION 7880 9.7 12.5 78 11.5 12.4 93
CLOUD PEAK RESERVOIR 9860 16.4 16.0 103 14.9 14.5 103
DOME LAKE 8880 -M 14.5 * 12.1 14.1 86
GRAVE SPRINGS 8550 8.7 10.2 86 12.0 10.5 115
HANSEN SAWMILL 8760 5.0 7.5 67 9.1 8.6 106
MIDDLE POWDER 7760 12.0 13.0 93 16.7 12.7 132
POWDER RIVER PASS 9480 12.5 11.5 110 15.7 12.5 127
SUCKER CREEK 8880 11.2 13.0 87 14.0 14.1 99
TIE CREEK 6870 2.9 -M * 9.6 11.9 82
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Basin wide percent of average 91 105
BELLE FOURCHE
BLIND PARK 6890 7.0 11.5 61 16.4 11.1 148
NORTH RAPID CREEK 6130 6.1 -M * 13.9 -M *
WARREN PEAK 6520 11.0 11.5 96 -M 8.7 *
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Basin wide percent of average 79 148*
UPPER N. PLATTE RIVER
COLUMBINE 9400 18.9 24.7 77 22.4 25.5 88
DIVIDE PEAK 8800 20.7 21.7 96 25.9 24.2 108
ELK RIVER 8700 16.7 20.4 82 23.0 20.0 116
JOE WRIGHT 10120 20.9 23.4 90 27.2 26.5 103
NORTH FRENCH CREEK 10100 32.3 27.2 119 30.7 24.9 124
OLD BATTLE 10000 31.2 34.3 91 37.5 31.7 119
SOUTH BRUSH CREEK 8400 11.7 13.2 89 20.2 17.5 115
TOWER 10500 46.3 47.5 98 40.0 38.2 105
WEBBER SPRINGS 9200 19.9 28.5 70 27.4 26.7 103
WILLOW CREEK PASS 9540 12.6 13.0 98 12.5 13.5 93
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Basin wide percent of average 92 108
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.2 27.9 58 23.2 20.7 113
CASPER MTN. 7900 11.7 18.0 66 17.2 15.4 113
DEADMAN HILL 10220 16.4 17.4 95 17.7 17.9 99
DEER PARK 9700 18.2 -M * 23.4 -M *
LAPRELE CREEK 8320 -M 10.4 * 15.0 12.6 120
RENO HILL 8400 14.5 15.1 96 19.2 20.2 96
ROACH 9700 15.5 17.9 87 20.2 22.4 90
SAND LAKE 10080 36.7 34.7 106 29.7 21.7 138
SOUTH PASS 9040 19.2 17.2 112 20.4 18.2 113
WINDY PEAK 7840 7.0 9.1 77 13.5 10.4 131
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Basin wide percent of average 88 111
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 12.0 11.1 109 18.4 16.2 113
DIVIDE PEAK 8800 20.7 21.7 96 25.9 24.2 108
OLD BATTLE 10000 31.2 34.3 91 37.5 31.7 119
SANDSTONE RS 8150 13.2 15.2 87 21.7 19.9 110
WHISKEY PARK 8950 27.9 30.0 94 30.9 29.9 104
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Basin wide percent of average 94 111
UPPER GREEN RIVER
BIG SANDY OPENING 9100 17.2 15.2 113 16.0 17.2 93
BLIND BULL SUM 8650 29.5 30.5 97 23.2 25.4 92
EAST RIM DIVIDE 7930 14.5 14.6 99 14.9 16.0 93
ELKHART PARK G.S. 9400 14.5 14.6 100 15.2 16.9 90
GROS VENTRE SUMMIT 8775 16.2 16.0 101 16.2 16.9 96
KENDALL R.S. 7740 15.2 13.9 111 16.7 16.4 102
LOOMIS PARK 8240 -M 17.4 * 20.9 19.9 106
NEW FORK LAKE 8340 12.9 11.0 117 12.2 15.4 80
SNIDER BASIN 8250 18.4 15.4 120 18.5 16.0 116
SPRING CREEK DIVIDE 9000 31.7 29.0 110 29.2 28.9 101
TRIPLE PEAK 8500 31.5 26.5 119 31.4 32.7 97
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Basin wide percent of average 108 97
LOWER GREEN RIVER
HAMS FORK 7840 14.6 8.6 170 12.4 14.1 88
HEWINTA 9500 13.0 10.1 129 15.0 14.0 108
HICKERSON PARK 9150 6.5 6.8 95 10.5 10.4 101
HOLE-IN-ROCK 9150 6.6 6.5 104 10.7 10.4 104
INDIAN CREEK 9425 31.9 29.9 107 26.4 27.4 97
KELLEY R.S. 8180 17.7 17.5 102 19.7 19.9 99
STEEL CREEK PARK 10100 15.7 17.4 91 17.5 13.7 128
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Basin wide percent of average 110 103
UPPER BEAR RIVER
BUG LAKE 7950 23.9 20.7 117 21.4 20.5 105
HAYDEN FORK 9400 15.7 13.4 119 21.4 20.2 106
KELLEY R.S. 8180 17.7 17.5 102 19.7 19.9 99
LILY LAKE 9050 12.1 13.2 92 18.7 15.7 120
MONTE CRISTO 8960 27.7 29.7 94 27.7 27.0 103
SALT RIVER SUMMIT 7600 16.5 14.2 117 19.0 17.9 107
TRIAL LAKE 9960 21.9 25.7 86 22.9 25.2 91
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Basin wide percent of average 102 103
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-M = Missing data
* = Data may not provide a valid measure of conditions.
If the Basin wide percent of average value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.
The SNOW WATER EQUIVALENT Percent of Average represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the average value for those sites on this day.
The TOTAL PRECIPITATION Percent of Average represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the average value for those sites on this day.
Contact your state water supply staff for assistance.
Reference period for average conditions is 1961-90.
Provisional data, subject to revision.
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Normal Snow Water Equivalent and
Total Precipitation values
If the Basin Index (%) value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.
The SNOW WATER EQUIVALENT Percent of Median represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the Median value for those sites on this day.
The TOTAL PRECIPITATION Percent of Average represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the Average value for those sites on this day.
Contact your state water supply staff for assistance.
Medians and averages are calculated for the period 1981-2010.
Provisional data, subject to revision.
* Site -- Either: (a) the current value is missing; (b) the median or
average for the day is not available or is zero; or (c) for snow water
equivalent, the median for the day is less than 10% of the maximum
median value for the year.
* Basin - More than half of the sites within the basin are flagged with *,
preventing the calculation of a meaningful basin index.
The basin index is calculated as the sum of the valid current values
divided by the sum of the corresponding medians (for snow water equivalent)
or averages (for precipitation) and the resulting fraction multiplied by 100.